Improvement in direct-action steam-pumps



PATENTED APR. 28, 186 3 J. A. REED. DIRECT ACTION STEAM PUMP.

UNITED STATES PATENT OFFICE.

v JOHN A. nnnnon JERSEY crrnnnw JERSEY.

IMPROVEMENT [N DIRECT-ACTION STEAM-PUMPS.

Specification forming part of Letters PatentNo. 38,334, dated April 28, 1863; antedated 4 d w tl fi f- To all whom itmay' concern;

Be'it known thatL'JOHN A. REED, J ersoy-City, in the county of Hud'son'and State of New Jersey, have invented a new and-useful Improvement in, Direct Action Steam- Pumps; and I do hereby declare that the following is a fiill, clear, and exact description of the same, reference being had to the accompanying drawings, formingpart of this specification, in which- Figure 1 is a top view of a steam-pump with my invention. Fig. 2 isa cen trallon gitudinal vertical section of the same. Fig. 3. represents a vertical section of the valves parallel with Fig. 2,'showing them in position different from Fig. 2.

Similar letters of reference indicate correvsponding parts in the several figures.

This invention relates to the connection of thairatsra dsteamvalvcs so that both shall operate at the same moment to change the directionof the inovemen-tof the pistons. I employ but a single valve on each cylinder, such valve being of the rolling or cock kind; and my invention consists in making the connection of the said valves by means of weighted levers and a .tappet-rod actuated by a tappetarm on the piston-rod, whereby I obtain a very simple and very efi'ective system of valves and valve-gear for direct-action steam-pumps.

To enableothers skilled in the art to make and use my invention, I will proceed to describe its construction and operation.-

A isthe steam-cylinder fitted with a six-way cock, B, for the induction and eduction of steam; and 0 is the pump-cylinder arranged 'in line with A and fitted with a four-way cock, D,-for the induction and eduction of water. f-As these cocks have been previously used inengines and pumps independently of eachother, it is unnecessary to enter into any particular description of them. The stems or spindles b and d of the cooks are arranged horizontally transversely tothe length of the cylinders and parallel with each other. The spindle b of-the cock B has secured to it a -lever,-b, and the spindle d of the cock D has secured to it a lever, 01!, the said levers being so arran ged upon their respective spindles that'both are upright when the cooks are in their central positions, (shown in Fig. 3,) and all theirpassa-ges consequently closed to steam and water. The lower ends of the two levers are connected together by means of the hori- I to the piston-rod, acts. The movement of the piston in opposite directions alternately brings the .tappet-arm it into contact with one and the other of the two collars g 9* ofthe rod h, as the piston arrives within a suitable dis- .tance of the end of the cylinder, and as the piston continues its movement the arm, pushing the collar before it, moves the rod, which is thus made to act upon the levers to bring the cooks to the central or closed position shown in Fig. 3, and the steam is thus shut off from the cylinderA by the valve B. When the pump is working fast, the momentum acquired by the weights E E in their movement with the levers will carry the levers beyond the vertical position, and the said weights then produce by gravitation a suddenly continued movement of the levers, and so bring ports at the other ends of the cylinders to their respective eduction-pipes; or, if the pump is working so slowly that the momentum of the weights will not overcome, the friction of the cooks, the expansion of the steam in the cylinder behind the piston will produce a slightlycontinued movement of the latter, which will be sufficient to make the tappet-arm carry the levers slightly beyond the vertical position, when the weights E E will suddenly complete the movement of the levers and bring the cocks to the position to open the ports, as above mentioned. In either of the above cases the completion of the movement of the cooks by the weightsE E is efl'ected very suddenly, so that the pistons make no perceptible stop at the end of the stroke, but have their movement quickly reversed. Fig. 2 shows the pistons as having completed their movement to the right, and the cooks as having had their movement completed by the weights to permit the induction and eduction of steam and water for the movement of the pistons in the opposite direction. This system of'valves and valve-gear is so positive in its action, and yet so simple in its construction, that ithas a great '2 V 38.334 i l advantage over all other valve-gear for steam- The combination of the two cock-valves B pumps of which I have any knowledge. 1) on the steam and water cylinder, the levers 1 do not claim, broadly, s0 connecting the dd, weights EvEflial-lpetdfodf, and tappet-arm steam and wnterwnlves of a steam-pump thab h on the piston-rod, the whole combined and the water valve has a. positive movement (12- operating substantially as herein specifieda JOHN A. REED.

'gine or pump; but; W itncsses: I

What, I do claim as. n y invention, and desire I JAMES LAIRD, to secure by Letters Patent, is J. W. COO'MBS. l

rived from the steam; valve; neither do I claim the use of a cock-valve either in a steam-en- 

